Develop A Simple Math Calculator That Will Allow The User To Input The Right-hand-side (RHS) Of An Equation Into A Textbox?
Dec 12, 2011
I am trying to develop a simple math calculator that will allow the user to input the right-hand-side (RHS) of an equation into a textbox on the application and have the application evaluate the expression for a given value of x, which is also input
into the application by the user via another textbox.For example, if the user wants to evaluate the following expression,
y = 3 + 4*x + 5*x^2
then they would input into the textbox the RHS of the equation
3 + 4*x + 5*x^2
and then enter a value of x into the another textbox and click on the calculate button.I tried this:
answer = EquationTextBox.Text
but it doesn't work.
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Jun 16, 2011
I am new in programming, I am trying to develop a simple calculator but I am unable to connect the addition, subtraction and equal sign buttons.[code]
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Dec 29, 2009
I wanted to have a textbox that can be input in terms of numbers. Then I need to use the number user input into a certain equation. How I can do this??
Also if I want a user to input equation such as A+B into the box, but then I need to use the equation user input to find answer for certain A and B value. Can this be done?
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Mar 29, 2011
I want to create a simple calculator using only 1 textbox , 1 button and 1 label, but I don't know how to create the code.
for example if i write : 53+35-33=
and if i press the button it will calculate and the answer the label will show the answer (55).
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Jul 17, 2010
i got the following equations and want to apply it in VB.net, how do I construct it in VB.net.
[code..]
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May 4, 2010
I've pretty much have this assignment done. My main problem is to get the math to pan out and it's making me crazy. It's gotten to the point of staring blankly at my screen for the last 4 hours.I'm hoping that someone would be willing to take a quick peak and give me a shove in the right direction. The purpose is to type in a number in a textbox then choose using a fahrenheit radio button and a celsius button to calculate the corresponding conversion in a label box.
[Code]...
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Feb 28, 2011
I am trying to get some data in DataGrid from XML files. I am reading that XML data and putting that data in DataView and giving that DataView as DataSource to DataGrid.As i have a schema for my XML, i dont even give HeaderName as system automatically takes HeaderText as whatever is in XML Tags. Now my problem is Pagination alignment, i have pagination on my DataGrid but even setting
<PagerStyle HorizontalAlign="Right" Mode="NumericPages"/>
doesn't bring pagination to extreme right of datagrid, rather it brings pagination on right of first column of datagrid(my datagrid has 9 columns) see attached pic
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
'Bind data to Grid
BindGrid()
[code]...
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Jun 14, 2009
I want to add cross button image on the right hand side of tabPage.I m creating tabpages at Runtime.Mine code is added image to the left...I want to add it to the right....I m also adding text to the tabPage.& second Probs is dat..On button click suppose i add the first tab Page,Image is aded to the first Tab Page...When i click on button to create the second Tab,Image & text of First Tab Page is clear & so on.
[Code]...
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Feb 5, 2012
so i am new to v basic and as you can see in the picture below that i have 2 textboxes just to put in them 2 numbers and then do mathematical calcualtions on them and a label up there that shows the answer so i wanted to make 1 textbox to type in the 1 st number then press the symbol for example + and then type the 2nd number and then press equal so the result is formed in the same textbox the only problem is idk how i searched google but i couldnt understand here is my source code
[Code]...
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Feb 19, 2011
Im working on writing a program for doing standard deviation and as of right now im running into one slight issue with subtracting my mean from the original numbers. I will post most of my code so you can get an over view but i mostly just want help on this one little part for now. Im going to be making a website for school and put some programming stuff on it so i wanted to make just some random programs for it so this is school related but not really homework. It's line 26 and 27 that this is relating to. When i put a stop in my code and look at the result of arrayDifferences it gives me 0.0 when it should be -1. I know i can go this route and say arrayDifferences(1) = arrayDifferences(1) - arrayAvg but seeing as how i want this to be a random number of numbers input by the user i cant do that.
CODE:
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Mar 2, 2009
creating a mortgage calculator that display continuous information depending on the user input such as monthly payments, remaining balances, and interest paid. I am attempting to use a list box and am currently stuck. [code] Please use code tags when posting your code. Code tags are used like so.
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Jun 7, 2009
i need to take user input and make a very simple bar graph from it in vb.net.
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Apr 26, 2012
I'm trying to develop a converter of sorts, and I need it to always round up, however, math.ceiling is not working like I would like. The converter I'm trying to develop is a Canadian MMAR Calculator.Here is my code.
Public Class Form1
Private Property growtype As Object
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click[cod
For some reason, when the variable < .5 it rounds down, and when the variable is > .5 it rounds up, I thought math.ceiling always rounded to the highest nearest whole.The issue comes at growtype 2 and 3, this equation "(num1 * 365) / (250 * 1) * 1.3" where num1 = 18 returns 34.164, I want this to round up to 35.
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Mar 26, 2012
What I need to do is automatically generate a specific PIN number based on the current date. The formula goes like this: MMDD + 1234 = PIN. (ex. Date = 3/26/2012 -> 0326 + 1234 = 1560; With 1560 being the PIN number. I then need the PIN number to display as text, but that's the easy part, I really just need assistance with getting the date information in the proper format for the equation.
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Feb 19, 2012
If my Category and Forum selection is incorrect I am sorry and feel free to move it. I'd like to have the users input in the message box that will show. For example: There is a textbox and the user puts in their name as Bob. Then the message box would be: What my main goal is, is being able to include the users input they type inside the textbox inside the message box.
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Mar 20, 2012
I am trying my hand at making a simple poker hand analyzer in VB 2010 for a distance education intro to VB course at my school.My goal is to represent the cards in a table array. Rows are suits Clubs/Diamonds/Hearts/Spades and columns are values (A, 1, 2... K). However I have no clue how to design a Sub procedure that will recognize the hand the user inputs and add any possible results to a listbox (fourkind/threekind/pair/flush/straight/ace high straight). I don't understand how exactly I'm supposed to do this. My criteria isn't very strict. I can have a hand with more than one description, like a fullhouse + threekind + pair can all be used to describe one hand.
What I think I need to do is split the entered string to get 5 strings (each is a card). Then somehow find these in the table? I have no idea how to do this and I'm stumped... The instructions loosely call to look for a boolean value where cards(i,j) is set to 1 of the player is dealt card j in suit i. But I do not know how to achieve this.
As you can see my understanding on VB is extremely... basic (no pun intended). It's my first time ever learning a computer language, and I really regret taking this course via distance ed because the instructor and the TA absolutely refuse to communicate with the students. I am trying my best to practically self-teach with the thick text book.
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May 22, 2009
i am trying to make a simple Vb program for children to do simple maths, now im not sure im going about it the right way, i have stored all the questions in a database and have called them up to the form and that is working fine, i cant seem to get the right code to check the answer from the user against my stored answer, i am using txtBox to store my answer and a txtbox for the input
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Apr 13, 2008
Public Class form1
Inherits System.Windows.Forms.Form
Private Sub cmdCalc_Click(ByVal eventSender As System.Object, ByVal eventArgs As System.EventArgs) Handles
[CODE]..........
This is my code for solving the quadratic equation..you input an a,b and c value and it finds the roots but i dont know how to graph it.
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Jan 4, 2010
I know how to read input numbers, but when I input equation like A+B, I can't use the equation to add two numbers. I tried many times but failed to use the equation.
Here my
Public Class Form1
Dim Number1 As Double
Dim Number2 As Double
[CODE]....
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Sep 29, 2010
Sweet candy store currently has a special offering of heart shaped candy. It comes in two sizes: small and large. The company sells the large one for $29.50 and the small for $16.25.Design an application to calculate how much a costumer owes. When the user clicks the "Calculate" button, the program gets the number of large and small chocolate hearts ordered from the textboxes, calculates and displays the extended price for each type of the chocolate in a label. The program also calculates the weight of the chocolate to determine the shipping cost, displays the total weight, the shipping cost and the final total due. The large chocolate weighs 4 pounds 10 ounces, and the small one weighs 2 pounds 14 ounces. Shipping cost is 35 cents per pound and 3 cents for each additional ounce. Display all dollar amounts except the final total due with 2 decimal places. Display the FINAL TOTAL DUE with a leading dollar sign and 2 decimal places. Be sure to also include a CLEAR button that will remove all inputs/outputs from the form, and an EXIT button. Define the CALCULATE button as the accept button and the EXIT button as the cancel button.
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Feb 9, 2012
So i know this is more Math related but it would make life so much easier. What i want to do is enter 2 times into 2 text boxes and then subtract them from eachother to find out the hours inbetween as a decimal.
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Oct 15, 2011
I've created a user control with a simple text box and a corresponding label and added a few custom control properties. When added to a form, I'm trying to loop through all control of this type and evaluate the custom property. In the below, the cntl.MyCustomProperty is not recognized. I can evaluate the property when I check each user control on the form by name, but not by using the loop below. I would much rather use the loop as it is much cleaner.
For Each cntl As Control In Me.Controls
If (TypeOf cntl Is MyUserControl) And cntl.MyCustomProperty = "ABC" Then
''Do some stuff
End If
Next
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Jun 25, 2010
I have one table here with a list of UserIDs, Users, and ClientCodes. Each user can be assigned a client code to view that client's data elsewhere. Right now I have to change it for everyone via SQL Server and actually going into the table manually, but I'm trying to make a simple little program that will let the user change it themselves. All I need is a textbox that pulls the user based on a certain UserID from the table, and a drop down list that will not only show the current ClientCode they're set to, but allow me to change it and save that change to the table in the database.
What's the best way to go about this? I tried using the wizards but I guess that's not the best way to go about it. I have it displaying the correct user and their current ClientCode but that's about it.
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Aug 7, 2011
How can I get my app. to remember the text that was enterd into a TextBox by a user?
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Mar 13, 2009
I am trying to develop a simple inventory system. I now have all the database set up and would like to know if there is any code that I can refer to that alert users when the stock is low (e.g pop out window informing users that stock is low or change the number of stock in the database table into different colors).
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Feb 15, 2011
I'm trying to develop a simple program which will show a form with a listbox and a button. The buttom will allow a listbox entry to be selected and close the form. The entry will them be sent to the previous open application.
For example, I could select my postcode from the listbox and have it sent to the currently selected field in my internet browser. Or the current date to my text editor.[code]...
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Oct 11, 2009
I am doing a tutorial for a simple calculator. My question is how can I add code to make a botton that add my tax % to the total amount I have.
Option Explicit On
Public Class Form1
Dim firstnumber As Single
[Code]......
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Nov 26, 2010
I think for you my problem is very simple..I have done the same program in console mode without problem, now i try into windows form...
I generate by random 2 number A&B I multiply them and I will compare it with the result in my textbox3
if it the same as the computer has calculated il will show you congratulation, however i will say try again
I have a problem to calculate the sum, A&B are well generated but nothing in Calc Result
When Calc was working when I write nothing in the textbox3 and i click on Verify it show the msgbox congratulation.I'm looking just for this step, I've fixed the other issues And another things When It's right I would like to random another number for A&B after closing the msgbox, how can I processd ?
[Code]...
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Mar 11, 2010
I wanted to read input equation by user A+B and assign input user value to A and B to ask them to add and give answer. But I just can't get the code to work. I using VS2005 and VB.Net.[code]
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Jun 22, 2010
I am using VS2005 version of VB.Net programmer. I wanted to use the user input but most people tell me to use console...but I cannot use this function since my version is different, it will not show any results. I found that using mask textbox can use to read the user input but I don't know how the code can be written. I want user to input two number such as 1.345 and 2.355 and use this number for addition and give the answer. I not sure how I write the code for mask textbox to be read once user input the numbers.
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